SAE & USS Washers
Narrow (SAE) and wide (USS) flat washer patterns.
SAE for machine work, USS for structural bearing — both to ASME B18.21.1.
Standards.
SAE vs. USS washers
Both are standard flat washer series named for the old standards bodies: SAE washers run smaller outside diameters and thinner sections — sized for machinery — while USS washers run larger and thicker for structural and timber work. Same bolt size, different footprint.
- SAE — smaller OD, machine assembly
- USS — larger OD, structural bearing
- Both in every material we stock
Tips for purchasing
- Say SAE or USS — or give us the OD you need and we pick.
- Where the hole is slotted or oversized, USS (or a plate washer) is the answer.
- Certs on request.
Materials.
Representative capabilities — every item is manufactured or certified to your specification. Confirm requirements with our estimating team.
Commercial Flat Washers
General-purpose flat washers for load distribution.
Lock Washers
Helical spring and tooth washers that resist loosening.
Nord-Lock® Wedge Lock Washers
Genuine Nord-Lock® wedge-locking washer pairs, supplied by an authorised distributor, that lock bolted joints against vibration with tension rather than friction.